We just upgraded to SW2013. During the install, I just found out that I lost the ability to change the file names the way that solidworks does. I looked it up on how to fix it and I read that you need to have your default program assigned to it. Well that didn't work and now all of my solidwork file types are SldWorks 2013 Application. I cannot tell (without extra clicking) what file type the files are (e.g. assembly, drawing, parts...) Does anyone know how to fix this?

I can confirm that telling Windows to open files with Solidworks Launcher solves the problem. I simply had to right click on a .SLDPRT file, go to Properties, and change the "Opens with:" option to Solidworks Launcher. Did the same thing for a .SLDASM and .SLDDRW file and everything is back to normal!